58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
package super
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import (
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"regexp"
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"strings"
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)
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// OldVersion 检查 version2 对于 version1 来说是不是旧版本
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func OldVersion(version1, version2 string) bool {
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return CompareVersion(version1, version2) == 1
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}
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// CompareVersion 返回一个整数，用于表示两个版本号的比较结果：
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// - 如果 version1 大于 version2，它将返回 1
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// - 如果 version1 小于 version2，它将返回 -1
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// - 如果 version1 和 version2 相等，它将返回 0
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func CompareVersion(version1, version2 string) int {
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reg, _ := regexp.Compile("[^0-9.]+")
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processedVersion1 := processVersion(reg.ReplaceAllString(version1, ""))
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processedVersion2 := processVersion(reg.ReplaceAllString(version2, ""))
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n, m := len(processedVersion1), len(processedVersion2)
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i, j := 0, 0
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for i < n || j < m {
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x := 0
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for ; i < n && processedVersion1[i] != '.'; i++ {
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x = x*10 + int(processedVersion1[i]-'0')
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}
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i++ // skip the dot
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y := 0
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for ; j < m && processedVersion2[j] != '.'; j++ {
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y = y*10 + int(processedVersion2[j]-'0')
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}
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j++ // skip the dot
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if x > y {
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return 1
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}
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if x < y {
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return -1
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}
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}
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return 0
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}
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func processVersion(version string) string {
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// 移除首尾可能存在的非数字字符
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reg, _ := regexp.Compile("^[^.0-9]+|[^.0-9]+$")
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version = reg.ReplaceAllString(version, "")
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// 确保不出现连续的点
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version = strings.ReplaceAll(version, "..", ".")
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// 移除每一部分起始的 0
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versionParts := strings.Split(version, ".")
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for idx, part := range versionParts {
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versionParts[idx] = strings.TrimLeft(part, "0")
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}
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return strings.Join(versionParts, ".")
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}
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